package com.example.aop;

import cn.hutool.extra.servlet.ServletUtil;
import com.alibaba.fastjson.JSON;
import com.example.entity.system.SysLog;
import com.example.service.system.SysLogService;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;
import java.lang.reflect.Method;
import java.util.Date;
import java.util.Objects;

/**
 * @Description: 系统日志：切面处理类
 * @Author runto
 * @Date 2023/11/5 9:32
 * @PackageName:com.example.aop
 * @ClassName: SysLogAspect
 * @Version 1.0
 */
@Aspect
@Component
public class SysLogAspect {

    private static final Logger logger = LoggerFactory.getLogger(SysLogAspect.class);

    @Autowired
    private SysLogService sysLogService;

    //定义切点 @Pointcut
    //在注解的位置切入代码
    @Pointcut("@annotation( com.example.aop.MyLog)")
    public void logPointCut() {

    }

    //切面 配置通知
    @AfterReturning("logPointCut()")
    public void saveSysLog(JoinPoint joinPoint) {
        logger.info("进入切面...");

        HttpServletRequest request = ((ServletRequestAttributes) Objects
                .requireNonNull(RequestContextHolder.getRequestAttributes())).getRequest();
        //保存日志
        SysLog sysLog = new SysLog();

        //从切面织入点处通过反射机制获取织入点处的方法
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        //获取切入点所在的方法
        Method method = signature.getMethod();

        //获取操作
        MyLog myLog = method.getAnnotation(MyLog.class);
        if (myLog != null) {
            String value = myLog.value();
            sysLog.setOperation(value);//保存获取的操作
        }

        //获取请求的类名
        String className = joinPoint.getTarget().getClass().getName();
        //获取请求的方法名
        String methodName = method.getName();
        sysLog.setMethod(className + "." + methodName);

        //请求的参数
        Object[] args = joinPoint.getArgs();
        //将参数所在的数组转换成json
        String params = JSON.toJSONString(args);
        sysLog.setParams(params);

        sysLog.setCreateDate(new Date());
        //获取用户名
//        sysLog.setUsername(ShiroUtils.getUserEntity().getUsername());
        sysLog.setUsername("admin");

        //获取用户ip地址
        sysLog.setIp(ServletUtil.getClientIP(request));

        //调用service保存SysLog实体类到数据库
        sysLogService.save(sysLog);

        logger.info("退出切面...");
    }

}